Interrupt, error, and system messages
4.4 Diagnostics with STEP 7
Diagnostic interrupt from the modules, byte x+12 to byte x+15
Figure 4-8
Structure of byte x+12 to byte x+15 for diagnostic frame
Interface module IM151-1 STANDARD (6ES7151-1AA06-0AB0)
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Manual, 07/2015, A5E01075950-AD